CN106658832B - A kind of LED power dimming controlling method - Google Patents
A kind of LED power dimming controlling method Download PDFInfo
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- CN106658832B CN106658832B CN201611042541.6A CN201611042541A CN106658832B CN 106658832 B CN106658832 B CN 106658832B CN 201611042541 A CN201611042541 A CN 201611042541A CN 106658832 B CN106658832 B CN 106658832B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses a kind of LED power dimming controlling methods, in this way, solving, LED driving intelligence degree is low, and dimming behavior is poor, the not high problem of degree of power conservation.This method combines user demand by real-time detection lighting environment, determines light emitting control parameter, realizes the accurate light modulation between different brightness, can precisely meet the light use demand of user.
Description
Technical field
The present invention relates to light emitting diode fields, and in particular to a kind of LED power dimming controlling method.
Background technique
The energy consumption of current flood tide and thus caused energy shortage, rise in price etc. energy saving to become one
The very urgent task of item.Greatly for illuminating in the energy of various countries' consumption.
The application of the solid-state light emitting element of light emitting diode (Light Emitting Diode, LED) this type has been got over
Come more extensive, the light source module in display panel, the lighting device in daily life, indicator light in public space etc. be all such as
Gradually popularly using light emitting diode as illuminating source.
However, the control of LED array brightness is not simple.In fact, human eye has logarithm for the change rate of light
The response of type.Therefore, linear brightness change is such as perceived as by human eye in order to obtain, using the letter for following exponential law
Number driving LED.
Pass through PWM light regulating technology, thus it is possible to vary the brightness of LED light, to save the energy.But existing light regulating technology changes
Become LED light brightness be not also it is too perfect, without completely consideration many factors influence.The brightness change of LED light is by extraneous factor
Influence it is too violent, variation rapidly, do not account for injury of the brightness change to human eye of acute variation；There are also be exactly LED light
Brightness change is affected by environment larger, and there is no limit the ranges of LE D lamp brightness change, and LED light service life is caused to greatly reduce
With unnecessary energy waste.
In addition, the control means of LED driving at present the problems such as that there are intelligence degrees is low, control is inconvenient.
Summary of the invention
To solve the above problems, the present invention provides a kind of LED power dimming controlling method, in this way, solving LED
Drive intelligence degree low, dimming behavior is poor, the not high problem of degree of power conservation.This method passes through real-time detection lighting environment, and
In conjunction with user demand, light emitting control parameter is determined, realize the accurate light modulation between different brightness, can precisely meet the light of user
Use demand.
To achieve the goals above, the present invention provides a kind of LED power dimming controlling method, and this method is believed according to driving
Number dim signal is generated, brightness of the dim signal to adjust LED, driving signal cuts between multiple states according to switching signal
Change, wherein when driving signal is switched to the second state by the first state of multiple states, dim signal is corresponding change so that
The brightness of LED is the second brightness by the first brightness adjustment；Wherein dim signal more with control signal adjustment input signal and by
It adjusts so that the brightness of LED is between the first brightness and minimum brightness, or between the second brightness and minimum brightness.
Preferably, this method can be switched to the second luminance patterns from the first luminance patterns, or switch from the first luminance patterns
To third luminance patterns, or the first luminance patterns can be switched to from the 4th luminance patterns, that is to say, that welcome to cut
Change luminance patterns.
Preferably, this method further includes the steps that determining light emitting control parameter, the light emitting control parameter include colour temperature, root
Control signal is determined according to the light emitting control parameter, and input signal is generated according to control signal, driving is generated according to input signal
Signal.
Preferably, it according to lighting environment information, current time and user's lighting demand, determines light emitting control parameter, wraps
It includes:
According to determining temporal information, external environmental information and user's lighting demand, the first pre-set list is inquired, is determined
The color temperature parameters of LED, wherein first pre-set list includes: temporal information, external environmental information and user's lighting demand
With the corresponding relationship of color temperature parameters.
Preferably, described according to temporal information, external environmental information and user's lighting demand, determine that light emitting control is joined
Number, further includes:
According to the temporal information and the color temperature parameters, the second pre-set list is inquired, determines the brightness ginseng of the LED
It counts, includes: the corresponding relationship of temporal information, color temperature information and illumination brightness in second pre-set list.
Preferably, the method also includes following steps, reach certain light emission luminance by drive module driving LED
Preferably, user demand is obtained in the following way:
User is set as in control module, human-computer interaction interface is provided, preset and store the specific of various contextual models
Parameter information, contextual model include: day mode and Night or leisure patterns and operating mode etc..Different mode
Parameter value is different, different effects may be implemented, to meet use demand of the user under different scenes；In each mode,
The parameter type that can be set includes: headlamp switch control parameter, lamplight brightness and color control parameter and other relevant controls
Parameter；
User is using mobile scanning terminal and link control module, and specific Connection Step is as follows: customer mobile terminal passes through
All LED devices near BLE Mode scans judge automatically LED light according to the UUID characteristic value in the control module of LED device
Light device is simultaneously attached；
Mobile terminal sends light use demand to the control module of LED light light device by bluetooth approach.
The present invention has the advantage that (1) solves, LED driving intelligence degree is low, and dimming behavior is poor, and degree of power conservation is not
High problem；(2) drive module more optimizes, and effectively reduces circuit cost；And it is described to correct by offset voltage
Lower limit value improves the switching speed of drive module, improves LED's so that the variation of level is synchronous with power switch tube realization
Work efficiency；(3) by real-time detection lighting environment, and user demand is combined, determines light emitting control parameter, realizes different brightness
Between accurate light modulation, can precisely meet the light use demand of user.
Detailed description of the invention
Fig. 1 shows a kind of block diagram of efficient LED driving power source system of the invention；
Fig. 2 shows a kind of flow charts of LED power dimming controlling method.
Specific embodiment
Fig. 1 shows a kind of efficient LED driving power source system 10, which includes:
Lighting environment detection module 11, for obtaining LED illumination environmental information in real time；The lighting environment detection module 11
Using photo controller PS-001.Drive module 13, alternating current is converted, for driving LED to shine.Light-adjusting module 12 is used
According to lighting environment or user demand, the luminosity of LED is adjusted；Driving power is coordinated and controlled to control module 14
System modules.
Wherein, the light-adjusting module 12 includes signal generating circuit, the first light adjusting circuit and the second light adjusting circuit；Signal
Generation circuit generates driving signal according to input signal, and switches driving signal between multiple states according to switching signal；
First light adjusting circuit generates dim signal, brightness of the dim signal to adjust LED according to driving signal；When driving signal is by more
When the first state of a state is switched to the second state, the first light adjusting circuit it is corresponding change dim signal so that LED brightness
It is the second brightness by the first brightness adjustment；Second light adjusting circuit according to control signal adjustment input signal and adjust dim signal with
Make the brightness of LED between the first brightness and minimum brightness, or between the second brightness and minimum brightness.
The drive module 13 includes alternating current-direct current rectification circuit, for being converted to electric main with the straight of certain voltage
Galvanic electricity；The alternating current-direct current rectification circuit include sequentially connected over-current protecting unit, common mode inhibition unit, full-bridge rectification unit with
And differential mode inhibits unit.
The drive module 13 include current sampling circuit, voltage sampling circuit, bleeder circuit, operational amplification circuit and
Spacing output circuit.
The drive module 13 further includes power switch tube, which is controlled its conducting by a control unit or cut
Only, the drive module is equipped with time-sharing multiplex end, the i.e. end CS/ZCD；When the time-sharing multiplex end is as the end CS, if CS level
Greater than a setting upper limit value, then described control unit is suitable for closing power switch tube, or when as the end ZCD, if ZCD level is lower than
One preset lower limit, then described control unit is suitable for opening power switch tube；And imbalance is additionally provided in described control unit partially
Circuits, which generates offset voltage, to correct the lower limit value, can effectively be corrected by correcting lower limit value
The conducting voltage of power switch tube improves the switch of drive module so that the variation of ZCD level is synchronous with power switch tube realization
Speed improves the working efficiency of drive module.
The control module 14 includes: information determination unit, is configured to determine that current time and the external environment letter of LED
Breath；
Control parameter determination unit is configured as determining light emitting control according to the current time and external environmental information
Parameter, the light emitting control parameter includes colour temperature；
Transmission unit is configured as the light emitting control parameter being sent to the light-adjusting module, so that the L ED root
It shines according to the light emitting control parameter.
The control parameter determination unit includes:
First parameter determines subelement, is configured as according to determining temporal information, external environmental information, inquiry first is pre-
List is set, determines the color temperature parameters of LED, wherein first pre-set list includes: temporal information, external environmental information and color
The corresponding relationship of warm parameter.
The control parameter determination unit further include:
Second parameter determines subelement, is configured as according to the temporal information and the color temperature parameters, inquiry second is pre-
List is set, determines the luminance parameter of the LED, includes: that temporal information, color temperature information and illumination are bright in second pre-set list
The corresponding relationship of degree.
Signal generating circuit generates driving signal according to the light emitting control parameter, and according to photo controller PS-001's
The illumination information that real-time detection arrives switches driving signal between multiple states.
First light adjusting circuit according to driving signal generate dim signal, dim signal be provided to light emitting diode L ED with
Adjust the brightness of LED.
Signal generating circuit includes filter circuit, voltage generation circuit and multisection type switching circuit.
Fig. 2 shows a kind of flow charts of LED power dimming controlling method, and this method comprises the following steps:
S1. real-time detection lighting environment information and determining current time；
S2. according to lighting environment information, current time and user's lighting demand, the light emitting control parameter of LED is determined；
S3. control signal is determined according to the light emitting control parameter, input signal is generated according to control signal, according to input
Signal generates driving signal；
S4. dim signal, brightness of the dim signal to adjust LED are generated according to driving signal.
Preferably, in S4, driving signal switches between multiple states according to switching signal, wherein when driving signal by
When the first state of multiple states is switched to the second state, dim signal is corresponding to be changed so that the brightness of LE D is by the first brightness
It is adjusted to the second brightness；Wherein dim signal is more adjusted with control signal adjustment input signal so that the brightness of LED is situated between
Between the first brightness and minimum brightness, or between the second brightness and minimum brightness.
Preferably, in S4, the second luminance patterns can be switched to from the first luminance patterns, or switch from the first luminance patterns
To third luminance patterns, or the first luminance patterns can be switched to from the 4th luminance patterns, that is to say, that welcome to cut
Change luminance patterns.
Preferably, in the S2, the light emitting control parameter includes colour temperature.
Preferably, described according to lighting environment information, current time and user's lighting demand in S2, it determines and shines
Control parameter, comprising:
According to determining temporal information, external environmental information and user's lighting demand, the first pre-set list is inquired, is determined
The color temperature parameters of LED, wherein first pre-set list includes: temporal information, external environmental information and user's lighting demand
With the corresponding relationship of color temperature parameters.
Preferably, described according to temporal information, external environmental information and user's lighting demand, determine that light emitting control is joined
Number, further includes:
According to the temporal information and the color temperature parameters, the second pre-set list is inquired, determines the brightness ginseng of the LED
It counts, includes: the corresponding relationship of temporal information, color temperature information and illumination brightness in second pre-set list.
Preferably, the method also includes following steps, reach certain light emission luminance by drive module driving LED,
Described in drive module include power switch tube, the power switch tube by a drive module control unit control its conducting or cut
Only, if power switch tube level is greater than a setting upper limit value, described control unit is suitable for closing power switch tube, if power is opened
It closes pipe level and is lower than a preset lower limit, then described control unit is suitable for opening power switch tube；The drive module control is single
Imbalance biasing circuit is additionally provided in member, which generates offset voltage, to correct the lower limit value, by under amendment
The conducting voltage of the effective corrected output switching tube of limit value energy, improves the switching speed of drive module, improves drive module
Working efficiency.
Preferably, in S2, user demand is obtained in the following way:
User is set as in control module, human-computer interaction interface is provided, preset and store the specific of various contextual models
Parameter information, contextual model include: day mode and Night or leisure patterns and operating mode etc..Different mode
Parameter value is different, different effects may be implemented, to meet use demand of the user under different scenes；In each mode,
The parameter type that can be set includes: headlamp switch control parameter, lamplight brightness and color control parameter and other relevant controls
Parameter；
User is using mobile scanning terminal and link control module, and specific Connection Step is as follows: customer mobile terminal passes through
All LED devices near BLE Mode scans judge automatically LED light according to the UUID characteristic value in the control module of LED device
Light device is simultaneously attached；
Mobile terminal sends light use demand to the control module of LED light light device by bluetooth approach.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several equivalent substitute or obvious modifications is made, and performance or use is identical, all should
It is considered as belonging to protection scope of the present invention.
Claims (5)
1. a kind of LED power dimming controlling method, this method generates dim signal according to driving signal, and dim signal is to adjust
The brightness of LED, driving signal switch between multiple states according to switching signal, wherein when driving signal is by the of multiple states
When one state is switched to the second state, dim signal is corresponding to be changed so that the brightness of LED is bright for second by the first brightness adjustment
Degree；Wherein dim signal more with control signal adjustment input signal and be adjusted so that LED brightness between the first brightness with
Between minimum brightness, or between the second brightness and minimum brightness；
Wherein, the control method is run based on efficient LED driving power source system, which includes:
Lighting environment detection module, for obtaining LED illumination environmental information in real time；The lighting environment detection module is using photosensitive
Controller PS-001；Drive module converts alternating current, for driving LED to shine；Light-adjusting module, for according to illumination ring
Border or user demand are adjusted the luminosity of LED；Driving power source system modules are coordinated and controlled to control module；
Wherein, the light-adjusting module includes signal generating circuit, the first light adjusting circuit and the second light adjusting circuit；Signal generates electricity
Road generates driving signal according to input signal, and switches driving signal between multiple states according to switching signal；First adjusts
Optical circuit generates dim signal, brightness of the dim signal to adjust LED according to driving signal；When driving signal is by multiple states
First state when being switched to the second state, the corresponding change dim signal of the first light adjusting circuit so that the brightness of LED by first
Brightness adjustment is the second brightness；Second light adjusting circuit adjusts dim signal so that LED according to control signal adjustment input signal
Brightness between the first brightness and minimum brightness, or between the second brightness and minimum brightness；
The drive module includes alternating current-direct current rectification circuit, for electric main to be converted to the direct current with certain voltage；
The alternating current-direct current rectification circuit includes sequentially connected over-current protecting unit, common mode inhibition unit, full-bridge rectification unit and difference
Mould inhibits unit；
The drive module includes that current sampling circuit, voltage sampling circuit, bleeder circuit, operational amplification circuit and isolation are defeated
Circuit out；
The drive module further includes power switch tube, which controls its on or off, institute by a control unit
Drive module is stated equipped with time-sharing multiplex end, the i.e. end CS/ZCD；When the time-sharing multiplex end is as the end CS, if CS level is greater than one
Upper limit value is set, then described control unit is suitable for closing power switch tube, or when as the end ZCD, if ZCD level is lower than a setting
Lower limit value, then described control unit is suitable for opening power switch tube；And imbalance biasing circuit is additionally provided in described control unit,
The imbalance biasing circuit generates offset voltage, to correct the lower limit value, can effectively be opened corrected output by amendment lower limit value
The conducting voltage for closing pipe improves the switching speed of drive module so that the variation of ZCD level is synchronous with power switch tube realization,
Improve the working efficiency of drive module；
Wherein, this method determines light emitting control parameter according to lighting environment information, current time and user's lighting demand, packet
It includes:
According to determining temporal information, external environmental information and user's lighting demand, the first pre-set list is inquired, determines LED
Color temperature parameters, wherein first pre-set list include: temporal information, external environmental information and user's lighting demand with
The corresponding relationship of color temperature parameters；
Wherein, user demand is obtained in the following way:
User is set as in control module, human-computer interaction interface is provided, preset and store the design parameter of various contextual models
Information, contextual model include: day mode and Night or leisure patterns and operating mode；The parameter value of different mode
Different effects may be implemented in difference, to meet use demand of the user under different scenes；In each mode, it can set
Parameter type include: headlamp switch control parameter, lamplight brightness and color control parameter and other associated control parameters；
For user using mobile scanning terminal and link control module, specific Connection Step is as follows: customer mobile terminal passes through BLE mould
All LED devices, judge automatically LED lamplight according to the UUID characteristic value in the control module of LED device and set near formula scanning
It is standby and be attached；
Mobile terminal sends light use demand to the control module of LED light light device by bluetooth approach.
2. the method as described in claim 1, which is characterized in that this method can be switched to the second brightness mould from the first luminance patterns
Formula, or third luminance patterns are switched to from the first luminance patterns, or the first brightness can be switched to from the 4th luminance patterns
Mode, that is to say, that welcome switching luminance patterns.
3. method according to claim 2, which is characterized in that this method further includes the steps that determining light emitting control parameter, institute
Stating light emitting control parameter includes colour temperature, determines control signal according to the light emitting control parameter, generates input according to control signal
Signal generates driving signal according to input signal.
4. method as claimed in claim 3, which is characterized in that illuminated according to temporal information, external environmental information and user
Demand determines light emitting control parameter, further includes:
According to the temporal information and the color temperature parameters, the second pre-set list is inquired, determines the luminance parameter of the LED, institute
State include: in the second pre-set list temporal information, color temperature information and illumination brightness corresponding relationship.
5. method as claimed in claim 4, which is characterized in that the method also includes following steps, are driven by drive module
LED reaches certain light emission luminance.
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| CN107645805A (en) * | 2017-09-23 | 2018-01-30 | 苏州思创源博电子科技有限公司 | A kind of LED high effective controlling lights control method |
| CN109496036A (en) * | 2018-11-07 | 2019-03-19 | 西安非凡士智能科技有限公司 | A kind of Internet of Things lighting system and method that can temporally adjust light scene |
| CN111552143B (en) * | 2020-05-09 | 2021-08-31 | 深圳市火乐科技发展有限公司 | Projector and dimming system thereof |
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| CN101951708B (en) * | 2009-07-10 | 2013-09-18 | 深圳比亚迪微电子有限公司 | Light modulating control circuit, chip and method |
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| CN203289686U (en) * | 2012-12-27 | 2013-11-13 | 茂晖科技股份有限公司 | LED color temperature adjusting device and light emitting system having same |
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